from __future__ import annotations

import json
from decimal import Decimal
from pathlib import Path
from typing import Any

from .economics import build_liquidity_summary, build_snapshot
from .load import (
    default_data_dir,
    latest_period,
    load_budget,
    load_expense_records,
    load_market_signals,
    load_membership,
    load_monthly_ledger,
    load_payment_records,
    load_pricing_models,
    load_product,
    load_value_range,
)
from .allocation import build_cost_allocation
from .credits import build_credit_summary, load_credit_wallets
from .membership_analytics import build_membership_analytics
from .pricing_context import build_cost_floor, build_market_price_view, build_value_range_view
from .recommendations import build_pricing_recommendations
from .simulator import build_pricing_simulations
from .usage import build_usage_summary, load_usage_records


def _serialize(value: Any) -> Any:
    if isinstance(value, Decimal):
        return str(value)
    if hasattr(value, "__dataclass_fields__"):
        return {key: _serialize(getattr(value, key)) for key in value.__dataclass_fields__}
    if isinstance(value, list):
        return [_serialize(item) for item in value]
    if isinstance(value, dict):
        return {key: _serialize(item) for key, item in value.items()}
    return value


def _load_json_catalog(data_dir: Path, name: str) -> dict:
    path = data_dir / "infrastructure" / name
    if not path.exists():
        return {}
    return json.loads(path.read_text(encoding="utf-8"))


def build_dashboard_payload(data_dir: Path | None = None, period: str | None = None) -> dict:
    root = data_dir or default_data_dir()
    product = load_product(root)
    budget = load_budget(root)
    models = load_pricing_models(root)
    members = load_membership(root)
    payments = load_payment_records(root)
    expenses = load_expense_records(root)
    ledger = load_monthly_ledger(root)
    target_period = period or latest_period(ledger)

    snapshot = build_snapshot(target_period, product, models, members, payments, ledger)
    liquidity = build_liquidity_summary(budget, payments, ledger, target_period)
    payment_by_period = {record.period: record for record in payments}

    history = []
    for month in sorted(ledger, key=lambda row: row.period):
        if month.period > target_period:
            continue
        payment = payment_by_period.get(month.period)
        net_payment = payment.net_amount if payment else Decimal("0")
        history.append(
            {
                "period": month.period,
                "active_members": month.active_members,
                "gross_revenue": month.gross_revenue,
                "infrastructure_cost": month.infrastructure_cost,
                "payment_processing_cost": month.payment_processing_cost,
                "total_platform_cost": month.total_platform_cost,
                "net_payment": net_payment,
                "net_liquidity": net_payment - month.infrastructure_cost,
            }
        )

    value_range_raw = load_value_range(root)
    market_raw = load_market_signals(root)
    usage_records = load_usage_records(root)
    usage_summary = build_usage_summary(usage_records, target_period)
    cost_floor = build_cost_floor(snapshot, models)
    value_range = build_value_range_view(value_range_raw, snapshot, product, models)
    market_price = build_market_price_view(market_raw)
    cost_allocation = build_cost_allocation(snapshot, usage_records)
    ai_cost_per_member = usage_summary["cost_per_active_user_eur"]
    simulations = build_pricing_simulations(snapshot, models, ai_cost_per_member)
    credit_wallets = load_credit_wallets(root)
    credit_summary = build_credit_summary(
        credit_wallets,
        {key: value for key, value in usage_summary["by_member"].items()},
        target_period,
    )
    recommendations = build_pricing_recommendations(
        cost_floor, value_range, market_price, simulations, usage_summary
    )

    return _serialize(
        {
            "design_reference": "https://claude.ai/design/p/fb2eef8c-c1fc-4c75-bff4-3782552e5511",
            "period": target_period,
            "product": product,
            "budget": budget,
            "snapshot": snapshot,
            "liquidity": liquidity,
            "history": history,
            "pricing_models": models,
            "members": members,
            "payments": payments,
            "expense_record_count": len(expenses),
            "membership_analytics": build_membership_analytics(
                members, target_period, [row["period"] for row in history]
            ),
            "cost_floor": cost_floor,
            "value_range": value_range,
            "market_price": market_price,
            "usage": usage_summary,
            "cost_allocation": cost_allocation,
            "pricing_simulations": simulations,
            "credit_wallets": credit_summary,
            "recommendations": recommendations,
            "infrastructure": {
                "domains": _load_json_catalog(root, "domains.json"),
                "virtual_servers": _load_json_catalog(root, "virtual_servers.json"),
                "stripe": _load_json_catalog(root, "stripe.json"),
            },
        }
    )


def payload_json(data_dir: Path | None = None, period: str | None = None) -> str:
    return json.dumps(build_dashboard_payload(data_dir, period), indent=2)